At DMG Motorsports, we present the All Balls Racing Brake Master Cylinder Rebuild Kit (SKU 21-81079) — a purpose-built solution designed to bring a leaking or tired rear brake master cylinder back to like-new performance. Engineered specifically to fit select Yamaha models, this kit takes the guesswork out of a master cylinder rebuild by bundling every wear item you need into one convenient package, so you can restore firm, reliable braking without hunting down individual parts.

Leaking master cylinders are more than an annoyance — they can lead to spongy brakes, fluid loss, and a real safety concern on the road or trail. This All Balls rebuild kit tackles the root cause by replacing the internal seals and hardware responsible for containing brake fluid pressure, giving your master cylinder a fresh, dependable seal at a fraction of the cost of a full replacement unit.

Features:

• Complete rebuild kit contains all the parts needed to re-seal a leaking brake master cylinder
• Includes cup seals, copper washers, o-rings, and replacement screws where applicable
• Designed as a direct-fit solution for the rear brake master cylinder on select Yamaha models
• Restores consistent brake feel and helps eliminate fluid leaks from a worn master cylinder
• Sold as a complete kit, taking the guesswork out of sourcing individual seal components
• A cost-effective alternative to replacing the entire master cylinder assembly
• Backed by All Balls Racing, a trusted name in powersports repair and rebuild components

Fitment